I'm 18% at the moment but I look leaner. Cutting down from near 30% has been a game changer, PM me if you'd like pictures. 20% to 10% is very significant too, provided you have at least decent bone structure. Your profile will look sharper, from the front you'll look leaner, and if you have a decent ogee curve at the end your 3/4s will skyrocket. If you've not got the bones it won't be much of a difference, might even look worse. If you were to show us pictures we might be able to figure it out.